float.h

来自「This is a resource based on j2me embedde」· C头文件 代码 · 共 84 行

/*
 * @(#)float.h	1.21 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.  
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER  
 *   
 * This program is free software; you can redistribute it and/or  
 * modify it under the terms of the GNU General Public License version  
 * 2 only, as published by the Free Software Foundation.   
 *   
 * This program is distributed in the hope that it will be useful, but  
 * WITHOUT ANY WARRANTY; without even the implied warranty of  
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU  
 * General Public License version 2 for more details (a copy is  
 * included at /legal/license.txt).   
 *   
 * You should have received a copy of the GNU General Public License  
 * version 2 along with this work; if not, write to the Free Software  
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  
 * 02110-1301 USA   
 *   
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa  
 * Clara, CA 95054 or visit www.sun.com if you need additional  
 * information or have any questions. 
 *
 */

#ifndef _GCC_32_BIT_FLOAT_H
#define _GCC_32_BIT_FLOAT_H

#ifndef longMin
#define longMin      (0x8000000000000000LL)
#endif
#ifndef longMax
#define longMax      (0x7fffffffffffffffLL)
#endif

/*
 * See src/share/javavm/include/porting/float.h for full documentation.
 */

/*
 * Float Conversions:
 */

#define CVMfloat2Long(val) \
    float2Long((val))

/*
 * JAVA_COMPLIANT_f2l, NAN_CHECK_f2l, or neither (but not both) may be
 * defined.
 *
 * If NAN_CHECK_f2l is defined, then BOUNDS_CHECK_f2l may be defined.
 */

#ifdef JAVA_COMPLIANT_f2l

#define float2Long(val)   (CVMJavaLong)((val))

#elif (defined(NAN_CHECK_f2l))

#define float2Long(val)   ((val) != (val) ? 0LL : float2Long0(val))

#else

extern CVMJavaLong float2Long(CVMJavaFloat d);

#endif

#ifdef BOUNDS_CHECK_f2l

#define float2Long0(val) \
    (  ((val) <= -9223372036854775808.0) ? longMin : \
                   ((val) >= 9223372036854775807.0) ? longMax : \
                   (CVMJavaLong)(val) )

#else

#define float2Long0(val)  ((CVMJavaLong)(val))

#endif

#endif /* _GCC_32_BIT_FLOAT_H */